Re: Let's Get Crazy...

Okay to save everyone some trouble I have some rough numbers. PEX is measured in CTS-OD which means the area of 3/8" PEX is less than .20 of an inch. Here is the area of the copper pipe the system is available in.

1" = .78

1 1/4" = 1.13

1 1/2" = 1.77

2" = 3.14

So unless you are you sizing your risers to their maximum I don't see there being a problem.

Now for expansion, for every 100 degrees of temperature change there is 1.1 inches of expansion of every 100' of PEX. As the system is limited to 6-stories we are talking closer to .66 inches of expansion for every 100 degrees of change. If the system was installed in Southern California at 70 degrees the maximum expansion would be .33 of an inch plus whatever slop the installer builds into the system.

While using Google it appears this system has been in use in the US for at least 18-months. While that is not a long time, the idea of shell and tube is an old and proven method. I don't know enough about the system yet to be sold on it. I do know enough about the design ideas to be impressed.

Mark

Disclaimer: My math is approximate but close enough for a first review.

Okay to save everyone some trouble I have some rough numbers. PEX is measured in CTS-OD which means the area of 3/8" PEX is less than .20 of an inch. Here is the area of the copper pipe the system is available in.

1" = .78

1 1/4" = 1.13

1 1/2" = 1.77

2" = 3.14

So unless you are you sizing your risers to their maximum I don't see there being a problem.

Now for expansion, for every 100 degrees of temperature change there is 1.1 inches of expansion of every 100' of PEX. As the system is limited to 6-stories we are talking closer to .66 inches of expansion for every 100 degrees of change. If the system was installed in Southern California at 70 degrees the maximum expansion would be .33 of an inch plus whatever slop the installer builds into the system.

While using Google it appears this system has been in use in the US for at least 18-months. While that is not a long time, the idea of shell and tube is an old and proven method. I don't know enough about the system yet to be sold on it. I do know enough about the design ideas to be impressed.

Mark

Disclaimer: My math is approximate but close enough for a first review.

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